苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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杂志简介

主办单位: 苏州混凝土水泥制品研究院
中国混凝土与水泥制品协会
  • 主编 : 李建华
  • 常务副主编 : 王春蓉
  • 刊期 : 月刊
  • 电话 : 0512-68285716
  • E-mail : sccpitg@126.com
  • 国内统一刊号(CN) : 32-1173/TU
  • 国际标准刊号(ISSN) : 1000-4637
  • 邮发代号 : 28-80
hunnitu 微信公众号
hunnitu 扫码订购杂志

混凝土研究

单轴压缩荷载作用下混凝土损伤破坏的细观力学分析
单轴压缩荷载作用下混凝土损伤破坏的细观力学分析
  • 何 康1,屈 伸2,*
2024年第5期
摘要
引用本文
摘   要:基于伸缩因子函数的变形方法和蒙特卡罗方法,建立了由骨料、砂浆和二者之间的界面过渡区构成的混凝土随机骨料模型。采用有限单元法对混凝土随机骨料模型的抗压强度、应力峰值、应力分布、损伤状态等力学性能进行了数值计算,从细观尺度上分析了混凝土的损伤破坏过程及裂缝形貌特征。结果表明:在单轴压缩荷载作用下,混凝土首先在薄弱区域的界面过渡区处发生拉应力和剪应力集中,产生初始损伤;然后损伤扩展至水泥砂浆,形成贯穿裂缝;最终,导致混凝土承载力失效。 Abstract: Based on the deformation method of expansion factor function and Monte Carlo method, a concrete random aggregate model composed of aggregate, mortar and the interface transition zone between the two was established. The mechanical properties of the concrete random aggregate model, such as compressive strength, stress peak, stress distribution and damage state were analyzed by finite element method. The damage and failure process and crack morphology characteristics of concrete were analyzed at a microscopic scale. The results show that concrete first experiences tensile and shear stress concentration at the Interface transition zone in weak areas under uniaxial compression load. At this time, the initial damage occurs. Then the damage extends to the cement mortar, and finally forms the connection crack, resulting in the failure of the concrete bearing capacity.
何康,屈伸.单轴压缩荷载作用下混凝土损伤破坏的细观力学分析[J].混凝土与水泥制品,2024(5):1-6. HE K,QU S.Meso-mechanical analysis of concrete damage under uniaxial compression load[J].China Concrete and Cement Products,2024(5):1-6.
初始损伤与硫酸盐耦合作用下混凝土的力学性能演化规律研究
初始损伤与硫酸盐耦合作用下混凝土的力学性能演化规律研究
  • 李忠宝1,王 峰1,宗元春1,苗浩禹2
2024年第5期
摘要
引用本文
摘   要:试验研究了初始损伤与硫酸盐腐蚀共同作用下混凝土的性能变化,建立了典型井壁混凝土硫酸盐腐蚀力学模型,分析了不同腐蚀时间井壁混凝土的承载力与裂缝的发展过程。结果表明:在初始损伤与硫酸盐腐蚀共同作用下,随着腐蚀龄期的延长,混凝土的抗压强度先增加后降低,弹性模量基本降低;混凝土的初始损伤越严重、腐蚀溶液浓度越高,混凝土的抗压强度增幅越小,降幅越大,弹性模量降低速率及降幅均越大;所建立的模型对井壁混凝土的腐蚀情况预测结果相对较好,受腐蚀井壁混凝土在受竖向压力破坏的过程中,裂缝朝着井壁外侧发展,破坏前内侧井壁混凝土并无征兆,危害性较大。 Abstract: The performance changes of concrete under the combined action of initial damage and sulfate corrosion were studied, and a typical sulfate corrosion mechanical model of wellbore wall concrete was established. The bearing capacity and crack development process of wellbore wall concrete at different corrosion times were analyzed. The results show that under the joint action of initial damage and sulfate corrosion, as the corrosion age prolongs, the compressive strength of concrete first increases and then decreases, and the elastic modulus basically decreases. The more severe the initial damage of concrete and the higher the concentration of corrosive solution, the smaller the increase and greater the decrease in compressive strength of concrete, and the greater the rate and magnitude of decrease in elastic modulus. The established model has relatively good prediction results for the corrosion of wellbore wall concrete. During the process of vertical pressure damage to the corroded wellbore wall concrete, cracks develop towards the outer side of the wellbore wall, and there is no sign of damage to the inner wellbore wall concrete before damage, indicating greater harm.
李忠宝,王峰,宗元春,等.初始损伤与硫酸盐耦合作用下混凝土的力学性能演化规律研究[J].混凝土与水泥制品,2024(5):7-11,16. LI Z B,WANG F,ZONG Y C,et al.Study on the evolution law of mechanical properties of concrete under the coupling of initial damage and sulfate[J].China Concrete and Cement Products,2024(5):7-11,16.
机制砂MB值对掺石粉混凝土性能的影响
机制砂MB值对掺石粉混凝土性能的影响
  • 张克永1,李春锦2,黄 盛1,汪保印2,任 强2,蒋正武2,*
2024年第5期
摘要
引用本文
摘   要:研究了不同机制砂MB值(0.75、2.75)对掺石粉混凝土的工作性、力学性能的影响。结果表明:机制砂MB值的增加会降低混凝土的工作性;当机制砂MB值较小时,适当的石粉掺量可以在一定程度上改善混凝土的工作性,但机制砂MB值过大对混凝土工作性的负面影响远大于石粉的正面影响;对于纯水泥或单掺粉煤灰组试件,机制砂MB值的增加会降低其抗压强度;而对于掺石粉的试件,机制砂MB值的增加会小幅提高其抗压强度;总体上,机制砂MB值对掺石粉混凝土抗压强度的影响相对较小。 Abstract: The influence of different MB values of manufactured sand (0.75, 2.75) on the workability and mechanical properties of concrete with stone powder was studied. The results indicate that an increase in the MB value of manufactured sand will reduce the workability of concrete. When the MB value of manufactured sand is small, an appropriate content of stone powder can improve the workability of concrete to a certain extent, but the negative impact of excessive MB value of manufactured sand on the workability of concrete is much greater than the positive impact of stone powder. For pure cement or single fly ash specimens, an increase in the MB value of the manufactured sand will reduce the compressive strength. For specimens mixed with stone powder, an increase in the MB value of manufactured sand will slightly increase the compressive strength. Overall, the influence of MB value of manufactured sand on the compressive strength of concrete with stone powder is relatively small.
张克永,李春锦,黄盛,等.机制砂MB值对掺石粉混凝土性能的影响[J].混凝土与水泥制品,2024(5):12-16. ZHANG K Y,LI C J,HUANG S,et al.Effect of the MB value of manufactured sand on properties of concrete with stone powder[J].China Concrete and Cement Products,2024(5):12-16.
基于响应面法的UHPC复合胶凝材料体系优化研究
基于响应面法的UHPC复合胶凝材料体系优化研究
  • 李 响1,王佳男1,胡江海1,付文翔1,徐 方2,*
2024年第5期
摘要
引用本文
摘   要:采用基于响应面法(RSM)的D-optimal最优化设计方法设计了超高性能混凝土(UHPC)净浆配合比,研究了复合胶凝材料组分对UHPC净浆湿堆积密实度、力学性能、干燥收缩性能的影响,结合XRD、SEM等微观测试结果分析了复合胶凝材料组分间的相互作用机理。结果表明:粉煤灰和硅灰可有效提高UHPC净浆的湿堆积密实度,优化基体内部颗粒堆积状态;硫铝酸盐水泥和粉煤灰对UHPC净浆的早期强度影响显著,掺入硫铝酸盐水泥可大幅提高UHPC净浆的早期力学性能。 Abstract: The D-optimal optimization design method based on response surface methodology(RSM) was used to design the slurry proportion of ultra-high performance concrete(UHPC). The influence of composite cementitious material components on wet packing density, mechanical properties, and drying shrinkage performance of UHPC slurry was studied, and the interaction mechanism between composite cementitious material components was analyzed by using XRD, SEM, and other microscopic test results. The results show that fly ash and silica fume can effectively improve the wet packing density of UHPC slurry and optimize the particle packing state inside the matrix. Sulfoaluminate cement and fly ash have a significant impact on the early strength of UHPC slurry. Adding sulfoaluminate cement can significantly improve the early mechanical properties of UHPC slurry.
李响,王佳男,胡江海,等.基于响应面法的UHPC复合胶凝材料体系优化研究[J].混凝土与水泥制品,2024(5):17-22,28. LI X,WANG J N,HU J H,et al.Optimization study of ultra-high performance concrete composite cementitious material system based on response surface method[J].China Concrete and Cement Products,2024(5):17-22,28.
粉末状缓释型聚羧酸减水剂的制备及性能研究
粉末状缓释型聚羧酸减水剂的制备及性能研究
  • 逄鲁峰1,2,安昊文1,3,*,赵淑静4,王 恒2
2024年第5期
摘要
引用本文
摘   要:以乙二醇单乙烯基聚乙二醇(EPEG)为大单体,调节丙烯酸羟乙酯和丙烯酸羟丙酯与大单体的摩尔质量比,以巯基丙酸为链转移剂,双氧水与次磷酸钠为氧化还原体系,并用中和溶剂调节减水剂母液pH值,制备了一种适用于离心喷雾干燥技术的粉末状缓释型聚羧酸减水剂PC-1000。通过正交试验确定了合成PC-1000粉末的最佳工艺参数为酸醚比3.0,酯醚比4.5,链转移剂用量0.36 %(占大单体的质量比),母液pH值为8。性能测试结果表明,通过离心喷雾技术制备出的PC-1000粉末在净浆测试中2 h流动度无损失,表现出优异的保坍效果。PC-1000粉末已在灌浆料和压浆料中成功应用。 Abstract: Ethylene glycol monovinyl polyethylene glycol (EPEG) was used as large monomer to adjust the molar mass ratio of hydroxyethyl acrylate and hydroxyl propyl acrylate to large monomer. By using mercaptopropionic acid as chain transfer agent, hydrogen peroxide and sodium hypophosphate as oxidation-reduction system, and adjusting the pH value of the mother liquor of the polycarboxylate superplasticizer with neutralizer, a kind of powder set retarding polycarboxylate superplasticizer PC-1000 powder suitable for centrifugal spray drying was prepared. The optimum process parameters are determined by the orthogonal test as follows. Acid ether ratio is 3.0, ester ether ratio is 4.5, and chain transfer agent content is 0.36%(mass ratio of large monomer). The performance test results show that the PC-1000 powder prepared by centrifugal spray technology has no loss of fluidity in 2 h in the actual slurry test, showing excellent slump retention effect. PC-1000 powder has been successfully applied in grout and pressed slurry.
逄鲁峰,安昊文,赵淑静,等.粉末状缓释型聚羧酸减水剂的制备及性能研究[J].混凝土与水泥制品,2024(5):23-28. PANG L F,AN H W,ZHAO S J,et al.Preparation and properties of set retarding type polycarboxylate superplasticizer powder[J].China Concrete and Cement Products,2024(5):23-28.
水泥基自修复微胶囊的制备及其修复效果研究
水泥基自修复微胶囊的制备及其修复效果研究
  • 吴承卉,李俊虎*,杨英豪,雷 航
2024年第5期
摘要
引用本文
摘   要:采用原位聚合法制备了以脲醛树脂为囊壁、环氧树脂GCC-135为囊芯的微胶囊,以抗压强度恢复率为指标评价了微胶囊的修复性能,研究了干燥养护、浸水养护(干养、湿养)条件下不同微胶囊掺量(水泥质量的0、1.5%、3.0%、4.5%、6.0%)对砂浆试件的修复效果。结果表明:在干养、湿养条件下,随着微胶囊掺量的增加,试件的抗折强度、抗压强度均降低;在不同微胶囊掺量下,干养试件的抗压强度恢复率为106.60%~124.29%,湿养试件的抗压强度恢复率为98.74%~110.12%,湿养条件下的修复效果明显低于干养条件;随着微胶囊掺量的增加,其修复效果先增加后略微降低,当微胶囊掺量为4.5%时,微胶囊的修复效果最佳。 Abstract: Microcapsules with urea formaldehyde resin as the wall and epoxy resin GCC-135 as the core were prepared by in-situ polymerization method. The self-healing performance of microcapsules was evaluated by using compressive strength recovery rate as an indicator. The repair effect of different microcapsule contents(0, 1.5%, 3.0%, 4.5%, 6.0% of cement mass) on mortar specimens was studied under dry curing and immersion curing (dry curing, wet curing). The results show that under dry and wet curing conditions, as the content of microcapsules increases, the flexural strength and compressive strength of the specimens decrease. Under different microcapsule contents, the compressive strength recovery rate of dry curing specimens is 106.60%~124.29%, and the compressive strength recovery rate of wet curing specimens is 98.74%~110.12%. The repair effect under wet curing conditions is significantly lower than that under dry curing. As the content of microcapsules increases, the repair effect first increases and then slightly decreases. When the content of microcapsules is 4.5%, the repair effect of microcapsules is the best.
吴承卉,李俊虎,杨英豪,等.水泥基自修复微胶囊的制备及其修复效果研究[J].混凝土与水泥制品,2024(5):29-33. WU C H,LI J H,YANG Y H,et al.Study on preparation of cement-based self-healing microcapsules and its repair effects[J].China Concrete and Cement Products,2024(5):29-33.
机制砂混凝土的力学性能及体积变形试验研究
机制砂混凝土的力学性能及体积变形试验研究
  • 吴振元1,曾路实2,汪 洋3,李 华3,4,王育江3,4
2024年第5期
摘要
引用本文
摘   要:对比研究了相同配合比条件下,机制砂和天然砂对C35混凝土的力学性能及体积变形的影响。结果表明:机制砂混凝土的力学性能明显优于天然砂混凝土;180 d时,机制砂混凝土的抗压强度较天然砂混凝土提高了15.3%,劈裂抗拉强度提高了4.3%;90 d时,机制砂混凝土的静弹性模量较天然砂混凝土提高了5.8%;机制砂混凝土的体积变形明显大于天然砂混凝土,180 d时,机制砂混凝土较天然砂混凝土的自收缩增大了约16.4%;机制砂中石粉掺量不宜过大,否则会显著增大混凝土的收缩开裂。 Abstract: The effects of mechanism sand and natural sand on the mechanical properties and volume deformation of C35 concrete under the same mix proportion conditions were studied. The results show that the mechanical properties of manufactured sand concrete are significantly better than those of natural sand concrete. At 180 d, the compressive strength of manufactured sand concrete increases by 15.3% compared to natural sand concrete, and the splitting tensile strength increases by 4.3%. At 90 d, the static elastic modulus of manufactured sand concrete increases by 5.8% compared to natural sand concrete. The volume deformation of manufactured sand concrete is significantly greater than that of natural sand concrete. At 180 d, the self-shrinkage of manufactured sand concrete increases by about 16.4% compared to natural sand concrete. The content of stone powder in the manufactured sand should not be too large, otherwise it will significantly increase the shrinkage and cracking of concrete.
吴振元,曾路实,汪洋,等.机制砂混凝土的力学性能及体积变形试验研究[J].混凝土与水泥制品,2024(5):34-36,41. WU Z Y,ZENG L S,WANG Y,et al.Experimental study on mechanical properties and volume deformation of manufactured sand concrete[J].China Concrete and Cement Products,2024(5):34-36,41.
水工混凝土防护涂层研究进展
水工混凝土防护涂层研究进展
  • 孟涵敬,罗 州,刘 俐*
2024年第5期
摘要
引用本文
摘   要:介绍了混凝土防护涂层的防护机理,根据防护涂层对混凝土表面孔隙的封闭效果,将其分为表面成膜涂层和渗透涂层两类,并对其组成、特点及取得的最新研究成果进行了总结。最后,对水工混凝土防护涂层进一步的研究方向进行了展望。 Abstract: The protective mechanism of concrete protective coatings is introduced. Based on the sealing effect of protective coatings on the surface pores of concrete, protective coatings are divided into two categories: surface film forming coatings and permeable coatings. Their composition, characteristics, and latest research results are summarized. Finally, further research directions for hydraulic concrete protective coatings are prospected.
孟涵敬,罗州,刘俐.水工混凝土防护涂层研究进展[J].混凝土与水泥制品,2024(5):37-41. MENG H J,LUO Z,LIU L.Research progress of protective coatings for hydraulic concrete[J].China Concrete and Cement Products,2024(5):37-41.

水泥混凝土制品

大口径PHC管桩混凝土的耐久性试验及工程应用研究
大口径PHC管桩混凝土的耐久性试验及工程应用研究
  • 户广旗
2024年第5期
摘要
引用本文
摘   要:研究了单掺、复掺超细粉煤灰(UFA)、超细矿粉(UMP)、硅灰(SF)对大口径PHC管桩混凝土耐久性的影响,优选出了最佳配合比,并在此基础上,考虑生产经济性,通过优化养护制度,制备了PHC1000AB130管桩。结果表明:当m水泥∶mUMP∶mSF=36∶5∶9、水胶比为0.28时,混凝土耐久性能最佳,其氯离子迁移系数为0.4×10-12 m2/s,280次干湿循环后混凝土抗硫酸盐耐蚀系数为0.85,混凝土抗渗等级达到P20;采用上述配合比生产的PHC1000AB130管桩,施工过程中平均贯入度为0.7~0.8 cm/击,沉桩过程中桩头、桩身均未破损,沉桩效果良好。 Abstract: The effects of single and compound addition of ultra-fine fly ash (UFA), ultra-fine mineral powder (UMP), and silica fume (SF) on the durability of large-diameter PHC pile concrete were studied, and the optimal mix proportion was selected. Based on this, considering production economy, PHC1000AB130 piles were prepared by optimizing the maintenance system. The results show that when mcement: mUMP: mSF=36∶5∶9, and the water cement ratio is 0.28, the durability of concrete is optimal, the chloride ion migration coefficient is 0.4×10-12 m2/s. After 280 dry wet cycles, the sulfate corrosion resistance coefficient of concrete is 0.85, and the impermeability grade of concrete reaches P20. The PHC1000AB130 pile produced by using the above mix proportion has an average penetration of 0.7~0.8 cm/beat during the construction process. The pile head and body of piles are not damaged during the pile sinking process, and the pile sinking effect is good.
户广旗.大口径PHC管桩混凝土的耐久性试验及工程应用研究[J].混凝土与水泥制品,2024(5):42-45,50. HU G Q.Study of durability test and engineering application on large-diameter PHC pile concrete[J].China Concrete and Cement Products,2024(5):42-45,50.
UHPC加固钢筋混凝土T梁的抗弯承载力计算
UHPC加固钢筋混凝土T梁的抗弯承载力计算
  • 靳玉栋1,陈 聪1,刘 鹤2,郭玉鹏1,亓兴军2,*
2024年第5期
摘要
引用本文
摘   要:综合考虑结构设计原理与现行桥梁加固规范,推导了UHPC加固钢筋混凝土T梁的抗弯承载力基本假定及计算公式,采用非线性有限元软件建立了试件的三维实体模型,进行了四点弯曲模拟试验,并对比分析了理论公式计算值与数值模拟试验值。结果表明:在截面高度增加10~20 cm的情况下,UHPC加固试件的抗弯承载力有显著提升;加固试件的抗弯承载力数值模拟试验值均大于理论计算值,平均相对误差为14.4%,理论公式具有一定的安全储备;推导的理论计算公式能简单、快速地预测试件的抗弯承载力,可为UHPC加固钢筋混凝土T梁的理论计算与工程应用提供参考。 Abstract: The basic assumptions and formula for the flexural capacity of UHPC-reinforced concrete T-beam  were deduced by combining the structural design principle with the current bridge reinforcement code. The nonlinear finite element software was used to establish a three-dimensional solid model of a simply supported T-beam, carry out four-point bending simulation tests, and compare the calculated values of the theoretical formulas with the numerical simulation test values. The results show that the flexural load capacity of T-beam is significantly increased with a small increase of 10~20 cm in section height, which proves that ultra-high performance concrete is an excellent bridge reinforcement material with high reinforcement efficiency; the numerical simulation test values of flexural load capacity of T-beam are larger than the theoretical calculation values after reinforcement, with an average relative error of 14.4%, and the theoretical formulas have a certain amount of safety reserves. The formula derived from the research results can predict the flexural load capacity of T-beam combined section beams in a simple, safe and fast way, and provide a reference for the theoretical calculation and engineering application of ultra-high-performance concrete reinforced reinforced concrete T-beam.
靳玉栋,陈聪,刘鹤,等.UHPC加固钢筋混凝土T梁的抗弯承载力计算[J].混凝土与水泥制品,2024(5):46-50. JIN Y D,CHEN C,LIU H,et al.Calculation of flexural capacity of UHPC-reinforced concrete T-beams[J].China Concrete and Cement Products,2024(5):46-50.

纤维材料及制品

含粗骨料UHPC的强度尺寸效应与性能研究
含粗骨料UHPC的强度尺寸效应与性能研究
  • 王 军,刘晓峰,陈镇衫,罗 西,余 辉,廖树基
2024年第5期
摘要
引用本文
摘   要:研究了胶凝材料组成比例、钢纤维类型(平直型、端钩型)对含粗骨料超高性能混凝土(UHPC)强度尺寸效应、工作性和收缩性能的影响,分析了减缩剂掺量(0~2.0%)对含粗骨料UHPC收缩性能、力学性能、抗氯离子渗透性能和孔结构的影响。结果表明:适当增加粉煤灰掺量有利于改善含粗骨料UHPC的工作性,降低收缩;掺入钢纤维降低了含粗骨料UHPC的工作性,但抑制了收缩,且端钩型钢纤维抑制效果更显著;掺入1%钢纤维能够有效降低含粗骨料UHPC的强度尺寸效应,且平直型钢纤维的降低效果更好;掺入减缩剂明显降低了含粗骨料UHPC的收缩,但会使抗压强度降低,总孔隙率增大,抗氯离子渗透性能变差。 Abstract: The effects of the composition ratio of cementitious materials and the type of steel fibers (straight and end-hooked) on the strength size effect, workablity and shrinkage properties of ultra-high performance concrete (UHPC) with coarse aggregates were investigated, and the effects of the content of shrinkage reducing agent (0~2.0%) on the shrinkage properties, mechanical properties, chloride ion penetration resistance and pore structure of UHPC with coarse aggregates were analyzed. The results show that increasing the content of fly ash appropriately is conducive to improving the workability and reducing the shrinkage of UHPC with coarse aggregates. The addition of steel fibers reduces the workability of UHPC with coarse aggregates, but inhibits the shrinkage, and the suppression effect is more significant with end-hooked steel fibers. Adding 1% content of steel fibers effectively reduces the strength size effect of UHPC with coarse aggregates, and the reduction effect of the straight steel fibers is better. The addition of shrinkage reducing agent obviously reduces the shrinkage of UHPC with coarse aggregates, but reduces the compressive strength, increases the total porosity, and deteriorates the chloride ion penetration resistance.
王军,刘晓峰,陈镇衫,等.含粗骨料UHPC的强度尺寸效应与性能研究[J].混凝土与水泥制品,2024(5):51-56. WANG J,LIU X F,CHEN Z S,et al.Study on strength size effect and performance of UHPC with coarse aggregates[J].China Concrete and Cement Products,2024(5):51-56.
玄武岩纤维混凝土抗压性能与韧性试验研究
玄武岩纤维混凝土抗压性能与韧性试验研究
  • 吴秋祺1,张 军2,徐怀江2,于志龙3,曾强忠3,张长杰3,黄亚进3,李家伟1,*
2024年第5期
摘要
引用本文
摘   要:为探索玄武岩纤维(BF)对混凝土力学性能的影响,以BF的长度(12、18、24 mm)和体积掺量(0.1%、0.2%、0.3%)为变量,研究了玄武岩混凝土的抗压性能与韧性,分析了BF对混凝土韧性改善的作用机理。结果表明:随着BF长度和掺量的增加,试件的抗压强度均先增大后减小,但差距不大,最佳BF长度和掺量分别为18 mm和0.1%;BF对混凝土变形能力与韧性的提升效果明显,BF的最佳长度为18 mm、掺量为0.2%,BF的掺入对混凝土峰值荷载前的韧性提升比峰值荷载后更明显。 Abstract: In order to explore the effects of basalt fiber (BF) on the mechanical performance of concrete, taking the length(12、18、24 mm) and content(0.1%、0.2%、0.3%) of BF as variables, the compressive performance and toughness of basalt fiber reinforced concrete were studied, and the mechanism of BF on the improvement of the toughness of basalt fiber reinforced concrete was analyzed. The results show that with the increase of the length and content of BF, the compressive strength of the specimen first increases and then decreases, but the difference is small, and the optimal length and content of BF are 18 mm and 0.1%, respectively. The effect of BF on the improvement of concrete deformability and toughness is obvious, and the optimal length of BF is 18 mm, and the content is 0.2%. The effect of BF on the improvement of toughness of concrete before peak loads are more pronounced than that after peak loads.
吴秋祺,张军,徐怀江,等.玄武岩纤维混凝土抗压性能与韧性试验研究[J].混凝土与水泥制品,2024(5):57-60. WU Q Q,ZHANG J,XU H J,et al.Experimental study on compression performance and toughness of basalt fiber reinforced concrete[J].China Concrete and Cement Products,2024(5):57-60.
盐冻作用下玄武岩纤维混凝土性能劣化研究
盐冻作用下玄武岩纤维混凝土性能劣化研究
  • 杨立勇
2024年第5期
摘要
引用本文
摘   要:针对北方地区温度较低时撒除冰盐对混凝土造成的盐冻破坏问题,研究了盐冻作用下玄武岩纤维(BF)的体积掺量(0~0.20%)对混凝土力学性能、断裂韧性的影响。结果表明:盐冻作用下,掺BF试件的单位面积质量损失和动弹性模量损失均比未掺BF试件的低;掺入适量BF提高了混凝土的抗压强度、抗弯强度及断裂韧性,BF的最佳掺量为0.12%。 Abstract: In order to solve the problem of salt freezing damage to concrete caused by spreading deicing salt under the low temperature environment in the northern region, the effect of volume content(0~0.20%) of basalt fiber(BF) on the mechanical properties and fracture toughness of concrete under the action of salt freezing was investigated. The results show that under the action of salt freezing, the mass loss of per unit area and loss of dynamic elastic modulus of the specimen with BF are lower than those of the specimen without BF. Adding appropriate content of BF improves the compressive strength, bending strength and fracture toughness of concrete, and the optimum content of BF is 0.12%.

房建材料及制品

节能砌块隐形密框复合墙体双面受火后滞回特性研究
节能砌块隐形密框复合墙体双面受火后滞回特性研究
  • 周玲玲1,李升才1,*,林文聪2,郑建英3,涂燕周4,郑建生5
2024年第5期
摘要
引用本文
摘   要:为了评价节能砌块隐形密框复合墙体(以下简称复合墙体)受火后的滞回特性,制作了6个缩尺比例为1∶2的试件,并对试件进行了双面受火试验和受火后平面内循环往复加载试验,研究了轴压比、受火时间对墙体骨架曲线及滞回特性的影响。基于试验结果和现有恢复力模型理论,考虑轴压比和受火时间影响,提出了适用于受火后墙体试件的退化四线型恢复力模型。相关计算分析结果表明:计算得到的骨架曲线与试验情况以及计算得到的恢复力模型与墙体滞回曲线吻合程度均较好,表明提出的恢复力模型可较好地反映轴压比和受火时间对其滞回特性的影响,可为该墙体的结构弹塑性分析及工程应用提供参考。 Abstract: In order to evaluate th hysteretic behavior of the energy-saving block and invisible multi-ribbed frame composite wall(composite wall) after fire, six 1∶2 reduced scale specimens were prepared. And the specimens were tested under double-sided fire and subjected to an in-plane cyclic load. The influences of axial compression ratio and fire time on the skeleton curve and hysteretic characteristics of the composite walls were studied. According to the test results and the existing theory of restoring force model, a regressive four-fold line restoring force model suitable for the walls considering the influence of axial compression ratio and fire time was proposed. The relevant calculation and analysis results show that the calculated skeleton curve is in good agreement with the experimental skeleton curve. The calculated restoring force model is consistent with the hysteresis curve of the wall, which shows that the proposed restoring force model can better reflect the influence of the axial compression ratio and the fire time on its hysteretic characteristics, and can provide reference for structural elastic-plastic analysis and engineering application of the wall.
周玲玲,李升才,林文聪,等.节能砌块隐形密框复合墙体双面受火后滞回特性研究[J].混凝土与水泥制品,2024(5):66-72. ZHOU L L,LI S C,LIN W C,et al.Study on the hysteretic behavior of energy-saving block and invisible multi-ribbed frame composite wall subjected to double-side fire[J].China Concrete and Cement Products,2024(5):66-72.
原材料对泡沫混凝土吸水性能的影响研究
原材料对泡沫混凝土吸水性能的影响研究
  • 韩 磊,李应权,扈士凯,陈志纯,任强伟,黄文辉
2024年第5期
摘要
引用本文
摘   要: 通过测试吸水率、孔洞微观形貌,研究了矿物掺合料(矿渣粉、粉煤灰、硅灰)、聚合物乳液(氯丁胶乳液、苯丙乳液、硬质环氧乳液)、憎水剂(有机硅、硬脂酸钙)对泡沫混凝土吸水性能的影响,并对作用机理进行了阐述。结果表明:矿渣粉对吸水率的影响程度有限,粉煤灰可在一定程度上降低吸水率,硅灰的加入显著提高了吸水率;三种聚合物乳液对吸水率的影响程度由大到小依次为氯丁胶乳液>苯丙乳液>硬质环氧乳液;憎水剂能有效降低吸水率,其中硬脂酸钙的效果明显好于有机硅;憎水剂在合适掺量范围内能有效降低孔洞缺陷率,同时由于其本身具有较好的疏水特性,进而可显著降低材料的吸水率。 Abstract:The effects of mineral admixtures(slag powder, fly ash and silica fume),polymer emulsions(neoprene emulsion, styrene-acrylic emulsion and hard epoxy emulsion) and hydrophobic agents(silicone, calcium stearate) on water absorption of foamed concrete were studied by measuring water absorption and pore morphology, and the reasons were explained. The results show that the influence of slag powder on water absorption is limited, fly ash can reduce water absorption to a certain extent, and silica fume significantly increases water absorption. The influence degree of the three polymer emulsions on water absorption in turn is neoprene emulsion>styrene-acrylic emulsion>hard epoxy emulsion.Hydrophobic agents can effectively reduce water absorption, and the effect of calcium stearate is obviously better than that of silicone. The hydrophobic agent can effectively reduce the hole defect rate of pore-wall in a appropriate dosage range, in addition, it has a good hydrophobic property, the interaction of these two effects make the material show a low water absorption rate.
韩磊,李应权,扈士凯,等.原材料对泡沫混凝土吸水性能的影响研究[J].混凝土与水泥制品,2024(5):73-77. HAN L,LI Y Q,HU S K,et al.Study on the influence of raw materials on water absorption of foamed concrete[J].China Concrete and Cement Products,2024(5):73-77.

标准解读

JC/T 2723—2022《预应力混凝土实心方桩》标准解读
JC/T 2723—2022《预应力混凝土实心方桩》标准解读
  • 蒋元海
2023年第4期
摘要
引用本文
为便于 JC/T 2723—2022《预应力混凝土实心方桩》的使用方准确理解标准条款的具体含义,正确贯彻实施标准条款的具体要求和规定,简述了该标准的编制背景、编制目的和意义,解释说明了标准条文的具体内容,并指出了标准实施过程中应注意的事项。 In order to facilitate the user of JC/T 2723—2022 Prestressed Concrete Solid Square Pile to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2723—2022 are briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.
蒋元海.JC/T 2723—2022《预应力混凝土实心方桩》标准解读[J].混凝土与水泥制品,2023(4):81-84. JIANG Y H.Interpretation on JC/T 2723—2022 Prestressed Concrete Solid Square Pile[J].China Concrete and Cement Products,2023(4):81-84.

检测及试验方法研究

灌浆料测强曲线对龄期与抗压强度的适用性研究
灌浆料测强曲线对龄期与抗压强度的适用性研究
  • 赵建华1,谢慧晟2,张建宇1,凌良建2,周红燕3,吕 嘉2
2023年第4期
摘要
引用本文
选择不同灌浆料制作了标准试件和模拟孔道PVC管试件,根据DB32/T 3754—2020《装配整体式混凝土结构检测技术规程》的要求,基于标准试件的抗压强度和模拟孔道PVC管试件的表面硬度建立了灌浆料测强曲线,分析了测强曲线对灌浆料龄期和抗压强度的适用性。结果表明:在灌浆料龄期≥14 d或抗压强度≥60 MPa的情况下,采用DB32/T 3754—2020中的方法建立的灌浆料测强曲线的适用性更强,可为实际工程中不同灌浆料实体抗压强度检测时间的选取提供参考。 Different sleeve grouting materials were selected to make standard test pieces and PVC pipe test pieces with simulated channels. According to the requirements of DB32/T 3754—2020 Technical Specification for Inspection of Monolithic Precast Concrete Structure, the strength curve of the grouting material was established based on the compressive strength of standard test pieces and the surface hardness of PVC pipe test pieces with simulated channels, and the applicability of the strength curve to the age and compressive strength was analyzed. The results show that when the age of grouting material is ≥14 days or the compressive strength of grouting material is ≥60 MPa, the strength test curve of grouting material established by the method in DB32/T 3754—2020 is more applicable, which can provide a reference for the selection of the testing time of the solid compressive strength of different grouting materials in practical projects.
赵建华,谢慧晟,张建宇,等.灌浆料测强曲线对龄期与抗压强度的适用性研究[J].混凝土与水泥制品,2023(4):85-87,92. ZHAO J H,XIE H S,ZHANG J Y,et al.Study on the Applicability of Grouting Material Strength Curve to Age and Compressive Strength[J].China Concrete and Cement Products,2023(4):85-87,92.

节能降碳

电解锰渣粉对混凝土孔结构及力学性能的影响
电解锰渣粉对混凝土孔结构及力学性能的影响
  • 吴 锐1,王超林1,*,夏 晔2,张 坤1
2024年第5期
摘要
引用本文
摘   要:研究了电解锰渣粉等质量取代0、10%、20%、30%、40%、50%的水泥对混凝土孔结构和力学性能的影响。结果表明:不同电解锰渣粉掺量试件中大孔、中孔、小孔的连通性均较差,且小孔数量较多;随着电解锰渣粉掺量的增加,试件中的孔隙数量增多,孔隙率增大,抗压强度降低,弹性模量基本呈降低趋势;与基准组相比,掺电解锰渣粉试件的应力-应变曲线的压密阶段和峰后失稳破坏阶段明显变长,说明延性有所提高。 Abstract: The effects of replacing 0, 10%, 20%, 30%, 40%, and 50% of cement with electrolytic manganese slag powder on the pore structure and mechanical properties of concrete were studied. The results show that the connectivity of macropores, mesopores, and micropores in specimens with different contents of electrolytic manganese slag powder is poor, and there are more micropores. With the increase of the content of electrolytic manganese slag powder, the number of pores in the specimen increases, the porosity increases, the compressive strength decreases, and the elastic modulus basically shows a decreasing trend. Compared with the benchmark group, the compression stage and post peak instability failure stage of the stress-strain curve of the specimen mixed with electrolytic manganese slag powder are significantly longer, indicating an improvement in ductility.
吴锐,王超林,夏晔,等.电解锰渣粉对混凝土孔结构及力学性能的影响[J].混凝土与水泥制品,2024(5):94-97. WU Rui, WANG Chaolin, XIA Ye,et al.Effect of electrolytic manganese slag powder on pore structure and mechanical properties of concrete[J].China Concrete and Cement Products,2024(5):94-97.
废玻璃粉在水泥基材料中的研究和应用进展
废玻璃粉在水泥基材料中的研究和应用进展
  • 王春福,王瑜玲
2024年第5期
摘要
引用本文
摘   要:基于“双碳”背景,总结了废玻璃粉的物理化学性质及其活性激发方式(机械粉磨、化学活化、高温激发、纳米改性),综述了废玻璃粉对水泥基材料工作性、水化反应、力学性能和耐久性能的影响,并对废玻璃粉的未来研究和应用方向进行了展望,可为提高废玻璃的资源化利用率和助力水泥行业的碳减排提供参考。 Abstract: Based on the background of "Double-Carbon", the physical and chemical properties, and several commonly used activation methods(mechanical grinding, chemical activation, high-temperature excitation, nano modification) of waste glass powder are summarized. The effects of waste glass powder on the workability, hydration reaction, mechanical properties, and durability of cement-based materials are summarized, and the future research and application directions of waste glass powder are discussed, which can provide reference for improving the resource utilization rate of waste glass and assisting the carbon reduction of the cement industry.
王春福,王瑜玲.废玻璃粉在水泥基材料中的研究和应用进展[J].混凝土与水泥制品,2024(5):98-103. WANG C F,WANG Y L.Research and application progress of waste glass powder in cement- based materials[J].China Concrete and Cement Products,2024(5):98-103.
煤矸石掺量对混凝土性能的影响研究
煤矸石掺量对混凝土性能的影响研究
  • 付鹏辉
2024年第5期
摘要
引用本文
摘   要:研究了煤矸石分别等体积替代粗骨料、细骨料(0、5%、10%、15%、20%、25%)对混凝土工作性、干表观密度和力学性能的影响。结果表明:掺入煤矸石粗骨料或细骨料总体上会导致混凝土的工作性、干表观密度和力学性能下降;综合考虑,推荐煤矸石粗骨料或细骨料的掺量均为5%。 Abstract: The effects of gangue replacing coarse and fine aggregates (0, 5%, 10%, 15%, 20%, 25%) in equal volume on the workability, dry apparent density and mechanical properties of concrete were studied. The results show that the addition of gangue coarse or fine aggregates generally leads to a decrease in workability, dry apparent density and mechanical properties of concrete. The recommended content of gangue coarse aggregate or fine aggregate is 5%.
付鹏辉.煤矸石掺量对混凝土性能的影响研究[J].混凝土与水泥制品,2024(5):104-108. FU P H.Research on the effect of gangue content on concrete properties[J].China Concrete and Cement Products,2024(5):104-108.
GS土体硬化剂对车站基坑加固土抗渗 性能的影响
GS土体硬化剂对车站基坑加固土抗渗 性能的影响
  • 王社江1,袁志刚2,薛永健1,李德猛2,王 飞1
2024年第5期
摘要
引用本文
摘   要:基于苏州某地铁车站基坑工程,研究了GS土体硬化剂对不同养护龄期下的粉质黏土和粉砂夹粉土抗渗性能的影响,并进行了现场试验验证。结果表明:掺入GS土体硬化剂能有效提高粉质黏土和粉砂夹粉土的抗渗性能,且随着GS土体硬化剂掺量和养护龄期的增加,提高效果更好;GS土体硬化剂在现场试桩试验中的应用效果较好,可为其在相关工程中的进一步推广应用提供参考。 Abstract: Based on the foundation pit project of a subway station in Suzhou, the influence of GS soil hardening agent on the impermeability performance of silty clay and silty sand mixed with silty soil at different curing ages was studied, and on-site tests were conducted to verify the results. The results show that the addition of GS soil hardening agent can effectively improve the impermeability of silty clay and silty sand mixed with silty soil, and the improvement effect is better with the increase of GS soil hardening agent content and curing age. The application effect of GS soil hardening agent in on-site pile testing is good, which can provide reference for its further promotion and application in related engineering.
王社江,袁志刚,薛永健,等.GS土体硬化剂对车站基坑加固土抗渗性能的影响[J].混凝土与水泥制品,109-111 WANG S J,YUAN Z G,XUE Y Jet al.Effect of GS soil hardening agent on impermeability performance of soil for station foundation pit[J].China Concrete and Cement Products,2024(5):109-111.

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2015年第1期
摘要
引用本文
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  • 汪秀石,杨智良,吴照学
2015年第2期
摘要
引用本文
摘   要:研究了装配式结构用高强套筒灌浆料的性能,通过试配并进行了流动度、强度和膨胀性试验,优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明,随着水胶比(W/B)增加,流动度逐渐增大,但强度随W/B增加呈现明显降低趋势;减水剂可有效改善流动度,而当掺量过多时对强度有一定的影响;膨胀率随膨胀剂掺量增加呈现增长趋势,但当掺量小于8.0%时,膨胀效果较差,掺量大于12.0%时,对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.
汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.
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  • 郭远新,李秋义,孔 哲,岳公冰,韩 帅
2015年第6期
摘要
引用本文
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郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.
无砂再生透水混凝土配合比设计
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2016年第12期
摘要
引用本文
张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.
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2016年第10期
摘要
引用本文
摘   要:20世纪90年代后期以来,清水混凝土研究及工程应用得到了长足发展,许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高,对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究,可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向,以实现清水混凝土技术研究水平的再提高,有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.
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  • 范 玉1,4,徐 华2,黄 新3,黄继战4,马北京4
2015年第12期
摘要
引用本文
摘   要:通过对建筑PC构件的设计、生产、施工进行的研究,对建筑PC构件进行了再设计及优化,确定了合理的PC构件生产及其施工工艺方案,并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction,  construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.
范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.
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2015年第12期
摘要
引用本文
摘   要:采用球磨法将石墨烯纳米片分散在水泥基体中,研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明,适量的石墨烯纳米片可均匀分散在水泥基体中,通过桥联效应和拔出效应对水泥基材料起增强增韧作用,当石墨烯纳米片掺量为0.04%时,石墨烯纳米片与水泥基体界面结合良好,没有明显过渡层,试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.
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大型智能PC构件自动化生产线简介
  • 孙 红1,孙 健1,吴玉厚1,赵凯军2
2015年第3期
摘要
引用本文
摘   要:根据混凝土工厂化生产的需要,阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点;分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程,总结了PC构件生产线的优点和技术创新突破点,可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.
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建筑垃圾再生微粉的研究现状
建筑垃圾再生微粉的研究现状
  • 毛新奇1,2,屈文俊1,朱 鹏1
2015年第8期
摘要
引用本文
摘   要:建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果,对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述,并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.
毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.
再生粗骨料及再生混凝土性能研究进展
再生粗骨料及再生混凝土性能研究进展
  • 甘 福1,周脉席1,3,濮 琦2
2018年第9期
摘要
引用本文
摘   要:结合国内外再生粗骨料混凝土的研究现状,综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容,展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.
甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.
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